Switch operating mechanism and fan



July 4 1959 C, R ABEN Z EZMJEQ:

SWITCH OPERATING MECHANISM AND FAN Filed Feb. 28, 1947 INVENTOR.dime/sync 2. 17616 7 Patented July 4, 1950 UNITED STATES PATENT OFFICESWITCH OPERATING MECHANISM AND FAN Clarence R. Aben, River Rouge, Mich.

Application February 28, 1947, Serial No. 731,485

2 Claims. 1

My invention relates to a new and useful improvement in a combinationswitch operating mechanism and fan adapted for use on electric motorsand the like.

In certain type motors, the construction of the stator comprises of arunning and a starting winding which are both energized at the startuntil the rotor has obtained suliicient speed to develop the propertorque at which time a switch associated with the rotor will, bycentrifugal action, be actuated for breaking the circuit to the startingwinding. The present invention is directed to this switch mechanism andan object of the present invention is to provide both a mechanism foroperating the switch responsive to centrifugal action and whereby thecentrifugal force will maintain the mechanism in such position that itwill serve as a fan blade or vanes for moving air through the casing ofthe motor.

It is another object of the present invention to provide a mechanism ofthe class described and which is simple in construction, economical ofmanufacture, durable, and highly eflicient in use.

It is still another object of the present inven tion to provide acombination switch mechanism and fan for electric motors of the classdescribed having vanes or blades mounted on the end of the rotor andpivotally connected thereto so that as the rotor is rotated, centrifugalforce will rock the blades or vanes to lie adjacent the periphery of therotor to act as blades for moving air through the casing, and to permitthe axial movement of a sleeve on the rotor shaft for actuating a switchbreaking the electrical circuit to the starting winding of the motor.

Other objects will appear hereinafter.

It is recognized that various modifications and changes may be made inthe detail of structure illustrated without departing from the inventionitself and it is intended that such shall be embraced Within the scopeof the claims which form a part hereof.

Forming a part of this specification are drawings in which:

Fig. 1 is a top plan view of a motor,

Fig. 2 is a sectional view taken along line 22 with the inventionapplied and illustrating its position when the motor is at a standstill,

Fig. 3 is a sectional View taken on line 3-3 illustrating the inventionwhen the rotor has obtained a predetermined speed,

Fig. 4 is a fragmentary, sectional view taken on line 4-4 of Fig. 2,

Fig. 5 is an enlarged fragmentary, sectional view taken on line 5-5 ofFig. 2,

Fig. 6 is a fragmentary, sectional view taken on line 6-6 of Fig. 2.

Shown in the drawing is an electric motor comprising the stator iron 1enclosed in a casing 8 having an end housing 9 in which is provided abushing l2 in which is bearinged the reduced end l3 of the rotor shaftM. The rotor 15 is secured on the shaft 14. A running winding 10 and astarting winding II is coiled through the stator iron Secured on the endwall of the rotor 15 are the lugs I 6 and 11. These lugs 16 and I! aremounted in spaced radial alignment on the rotor and pivotally secured tothe lug 16 by the rivet I8 is one end of link 20, and a link 2! ispivotally secured by the rivet l9 to the 111g [1. The opposite end ofthe link 20 is pivotally secured by a rivet 22 to the vane or blade 24,and the opposite end of the link 21 is pivotally secured by the linkrivet 23 to the vane or blade 24. Resting on the curved edge 25 of thevane or blade 24 is the flange 28 extended laterally of the collar 21that is slidably mounted on the shaft 14. Extended outwardly from a faceof the vane or blade 24 is a stud 39 to which one end of a spring 29 issecured and the opposite end of which is secured to the collar 21. Whenthe rotor is at rest, the spring 29 serves to hold and move the blade orvane 24 towards and against the collar 21 with the flange 28 restingupon the curved edge 25.

In engagement with the flange 28 are one end of the yoke arms 31 whichare pivotally supported by the pin 32 on the bracket arm 33. The yokearm 3| is provided with extension 34 which projects rearwardly of thepivot pin 32 and adapted to engage one end of a resilient arm 35 whichcarries a contact point 36 adapted to engage the contact point 31 on aresilient arm 38. The opposite end of the arms 35 and 38 are securedtogether and insulated from each other by insulating blocks 39 andsecured to the end casing 9 by the screws 40. The arm 35 is connected bya suitable wire 4| and the arm 38 by a suitable wire 42 which forms acircuit to the starting winding (not shown).

In operation, when the rotor is at rest, the vanes will be in theposition shown in Fig. 2 held by the spring 29 towards and against thecollar 21 and holding the collar 21 so that the yoke arms 3! are rockedupwardly against the tension of the contact arm 35 which is moved by theextension 34 so that the contact points 36 and 3'! are together forclosing the circuit to the starting winding. Upon the rotor obtaining apredetermined speed where it has developed a required torque, the vaneor vanes 24 will be moved, against the tension of the spring 29, bycentrifugal force to swing outwardly into the position shown in Fig. 3so that the edge 45 of the vane will lie in alignment with or just belowalignment with the periphery of the rotor 15. Further movement of theblade outwardly by centrifugal force is prevented by the link arm 2!striking against the arm 20 which serves as a stop against furtherrocking .movement of the link 21 :and thereby preventing further rockingmovement of the link 20. As the vane 2-5 moves outwardly, the radiusedge 25 would be so tilted that the point 25 will move downwarlypermittin a downward axial movement of thecollar Z! towards the end ofthe rotor li permittiilgnthe yoke arms 31 to follow and rock theextension 3'4 away from the resilient armslfiispermitting, it 2130 snapupwardly moving the contact point .36 away and out of contact irom thepoint 31 thereby breaking the electrical circuit to the starting*windingdl. v

As the vane or vanes 24 are'yheld outwardly by fcentrifu-gahforce, theywould act as a Ian for the drawing of, airinward-lythrough the opening43, formed in= the casing 9 andcaused topass outwardly with the heatedair within the motor casing through theopening 4f i,"-for1ned in the{casing Any number "of vanes may be radially '*positioned'on-the -end of*the rotor I5 as the number depends upon the size of the motorythequantity of air that *is desired to be moved f-th-rough-the casing, 'andthe'size of the van-es that -are -to be-eonstructed. j 'WhatIclaimas-new is: I

1. Adevice-o'f'the class described adapted for use 'with an electric"motor having -a rotatable :f shaft, -a rotor fixedly -mounted onsaidshaft, a driving windirrgand a starting winding, cornf i-prisingz --aswitch for controlling a circuit to said Y starting winding; an armiforpressing-said switch into"closingjposition; a plurality of- ;pairsofcir- -cumferentially spaced "apart '-1u gs m0unted on one o'f-the end=faces-of-said rotor, theflugs "in 1 :each {pair being in radialalignment and spaced apart to provide an inner lug and an outer :lug;a-link-pivotally mounted'pn one-end to said "outer lug a plate, saidlinkbeing pivotally :con- "nected at its opposite end to said plate ad-'jacentoneen'd; a second linkpivo'tallyconnected at one of its ,ends tothe other of said lugs in use with 13 111 electric ,motor having arotatable shaft, a rotor fixedly mounted on said shaft, a

idriving Winding and a starting winding, comprising: a switch forcontrolling a circuit to said i l starting-.windingglan arm for pressingsaid switch into closing ,position; a plurality of pairs ofcircumferentially spaced apart lugs mounted on aoneof ithe endfaces ofsaid rotor, the lugs in each ,pair being in radial alignment and spacedapartto provide an inner lug and an outer lug; a link pivotally mountedon one end to said outer lug; 4 a plate, said link being -vpivotallyconnected at its oppositeend to said plate adjacentone end; 'a secondlin-k pivotally connected at one of its ends to the other of saidlugslin the pair and pivotally connected at .itsoppOsite end .to ,said

I piateadjacent the opposite end .ofsaid :plate; a

collar slidableion said shaft; a peripheral fiange on one end of:saiducollar :for engaging :at one face said arm and :uponv moving :inone direction axially of the :shaft for moving said ,armrto, close saidswitch, said plate-:being ,engageablewith the opposite 'face of saidflange; and ;a spring (Q011- nected at one :end to said ,collar and atits op- :posite end :to said :plate for normally moving saidplateLonits-ilinks and :to "normally togretain :said collar in positioni for: efiecting the gclosing -;o:f

*saiidswitch, said :plate being adapted, uponjrocation of said rotor at-a-:predetermined speed, for swinging outwardly of-saidarotor ;on;i.tslinks CLARENCE 5R- ABEN- -The following references are of -recordinakthe file of "this patent:

IJNrrEnBiATEStATEnrs :Number Name Date 51,056,953 Bodinei,i a '-Dec. 10,1912 11-,979g480 Leland Nov.-,6, 1934 $2,057,525 Homing Got. 13, ,1936

."McCabe anvil--- Jan. .16, 1.84

